| Typicality: | 0.376 |
| Saliency: | 0.296 |
| for the formation of free radicals | 4 | purpose |
| during photosynthesis | 3 | temporal |
| iron → act as → catalyst | 7 |
| iron → be → catalyst | 4 |
| iron → be used as → catalyst | 4 |
| negative | neutral | positive |
| 0.250 | 0.611 | 0.138 |
| Raw frequency | 15 |
| Normalized frequency | 0.296 |
| Modifier score | 0.500 |
| Perplexity | 49.480 |